ADP7142ACPZN1.8-R7

Overview

The ADP7142ACPZN1.8-R7 is a low dropout linear regulator manufactured by Analog Devices Inc. It operates from an input voltage range of 2.7 V to 40 V and provides up to 200 mA of output current. The device delivers a fixed output voltage of 1.8 V with an initial accuracy of ±0.8%. It features ultralow output noise of 11 µV rms and high power supply rejection ratios of 88 dB at 10 kHz, 68 dB at 100 kHz, and 50 dB at 1 MHz. The quiescent current is typically 50 µA with no load and 180 µA at full load. The component is housed in a compact 6-lead LFCSP package measuring 2 mm × 2 mm.

Feature Summary

• Ultralow output noise of 11 µV rms independent of the fixed output voltage for options up to 5 V
• High power supply rejection ratio (PSRR) reaching 88 dB at 10 kHz
• User-programmable soft start capability via an external capacitor in LFCSP and SOIC packages
• Precision enable pin featuring programmable logic thresholds with hysteresis

Applications

• Regulation for noise-sensitive applications such as ADC and DAC circuits
• Powering precision amplifiers and providing control voltage for VCO VTUNE
• Communications and infrastructure equipment
• Medical and healthcare devices
• Industrial and instrumentation systems

Procurement Notes

Verify the specific ordering suffix R7 corresponds to reel packaging when sourcing components. Confirm that the ACPZN designation matches the required 6-lead LFCSP package type. Ensure compatibility with X5R or X7R ceramic capacitors meeting minimum capacitance requirements. Validate thermal performance parameters against the intended PCB layout and ambient operating conditions.

Selection Notes

Select this regulator for applications requiring high input voltages up to 40 V with low noise specifications. The 1.8 V fixed output option is suitable for sensitive analog circuits without requiring external adjustment resistors. Consider the LFCSP package for space-constrained designs needing excellent thermal performance. Verify that the minimum 2.2 µF output capacitance requirement aligns with system constraints.

Part Context

This component belongs to the ADP7142 family of CMOS low dropout linear regulators designed for high-performance analog and mixed-signal circuits. The series supports various fixed output voltages ranging from 1.2 V to 5.0 V and adjustable configurations. It is available in multiple package options including LFCSP, SOIC, and TSOT to accommodate different footprint and thermal requirements.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other fixed voltage variants such as ADP7142ACPZN3.3-R7 or ADP7142ACPZN5.0-R7. Adjustable versions like ADP7142ACPZN-ADJ-R7 offer flexibility but require external feedback networks. Cross-family replacements must be evaluated carefully regarding pinout compatibility and electrical specifications.